Differentiating mechanism.



M. -HVEEM. DIFFERENTIATING MECHANISM.

APPLICATION FILED APB-1,1915.

Patented Apr. 25, 1916.

UNITED STATES PATENT oF IcE.

MARTIN HVEEM, 01 Issues, CALIFORNIA, ASSIGNQR or ONE-FOURTH T0 Join: r.

FINNEGALT tam) ONE-FOURTH TO SHERMAN BRUNNER, BOTH or LA MOINE, 0

CALIFORNIA.

To all whom it mag concern:

Be it known that I, MARTIN Hvnim, a citizen of the United States, residing at Bayles, in the county of Shasta and State of California, have invented new and juseful Improvements in Differentiating Mechanism, of which the following is a specification.

This invention. relates to a differentiating mechanism. V

The object of the present invention is to provide a simple, substantial, cheaply manufactured differential particularly applicable to driving shafts in motor cars and the like, which is so constructed that compensating movement is obtained without the use of v gears and the like now usually employed, thereby simplifying: construction and per- I I mitting the engine power to be equally transmitted to the driven axles and Wheels and at the same time leaving either axle or wheel free to take the initiative'during the periods of increased or decreasedispeedr The invention consists of he parts and the construction: and- .combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawing, in whichp Figure 1 is alongitudinal section through the differential, showing it connected with the rear driving wheels of a car. Fig. 2 is an enlarged longitudinal section of the differential. Fig. 3 is a section on line 3-3 of Fig. 2. Fig.4 is a perspective View of shaft 6 and one half of oasing 2. Fig. 5 is a perspective. view of one-of the casing sections.

A indicates a casing which in this instance forms a closure for the differential mechanism generally indicated at B. Mounted interiorly of casing A is a second casing.2, and extending longitudinally through said casing are the rear driving axles of the car indicatedat 3 and 4. These axles are centrally divided and their inner ends are slightly enlarged, as indicated at 5, to form heads which are journaled interiorly of the casing 2. Extending through casing 2, at right angles to the axles 3 and 4, between the abut- I ting ends or. heads 5, is a shaft '6. This shaft is journaled in the casing andis also adaptcdto slide insame;

Formed on each'side of shaft 6 is a spherical or ball-like projection 7, and formed in the abutting or adjacent face of the heads 5 is a' recess 8 into which the sphere-like DIFFEBENTIATING. MECHANISM,

v Specification of Letters Patent. P tent 25, 191 Application filed April 7,. 1315. Serial No. 19,678. I

projections extend. The recesses 8 areeccentrically disposed with relation to the 'center of the axles 3 and 4, thus forming a crank-like connection between shaft 6 and the axles'3 and 4.

cated at 9, to permit the insertion of the shaft .6- and a general assembling of the differential mechanism, and the driving gear, such as indlcated at 10, is secured toeither 2 by means of the pinion 11 in the usual manner; the driving shaft being connected with the engine.

From the fore oing description it will be seen that the differential mechanism as a whole consistsof a casing 2 to which revolving movement is transmitted through gears 10 and 11, and that revolving mover The casing 2 is centrally divided, as indi-- ment of same is transmittedto the axles 3 and by means of shaft 6 and the spherical project ons formedthereon the coupling.

formed between shaft 6 and axles 3 and 4 being in reality nothing more or lessthan a universal joint.

In operation, when driving straight ahead, that is when the rear wheels, with connected axles 3 and 4, revolve at the same speed, it will be seen that power is transmitted directly from the revolving casing 2 to the axles 3 and 4 by means of shaft 6 and projections 77, said projections forming, in this instance, a crank-like connection between the two axles. If the vehicle passes around a turn, for instance'in the direction of arrow 0, it will readily be seen that the I outside Wheel 12 with connected axle 3, will have to turn a greater number of revolutions than the inner wheel 13 with con- 'nected axle 4. This is permitted in the present instance'as shaft 6 willreciprocate with relation to casing 2 sufficiently to permit projection 7 to turn in a circle about the center of axle 3 with pro]ection 7 as a cen ter. In fact, it would be possible for axle 4 to remain entirely stationary while axle 3 is V the axles 3 and 4-, with connected wheels,

and the axles are at'the same time free to ta th nitiative during periods of increase decreased speed.

The materials andfinish of the several parts of themechanism are such as the experience and judgment of the manufacturer may dictate. Y

I Wish it understood that various changes inform, proportions and minor details of construction may be resorted to within the scope of the appended claims and that I do not wish to limit myself to the specificdesign and construction here shown.

Having thus described my invention, What I claim and desire to secure by Letters Patent is- 1. A differential mechanism comprising a main casing having axle bearings and another bearing within the casing, a second casing comprising component sections formed with alined axle bearings, each casing section having a cylindrical portion" formed with a concentric cavity, the abutting edges of the casing sections being formed with a transversely disposed shaft bearing, a gear fixed on the cylindrical portion of one casing section, the cylindrical portion of the component section being journaled in said other bearing of and receiving support from the main casing, a pair of axles arranged in the axle bearings of the main and second casings, each shaft having a head enlargement snugly fitting in the cavity of the respective section and formed with a recess, and a shaft slidable in the shaft hearing of the second casing andprovided with lateral projections engaging in the recesses of the axle head enlargements,

2. A differential mechanism comprising a casing centrally divided to form sections each of which is provided with a central cavity having a concentric axle bearing and a transversely and diametrically arranged shaft bearing provided on the abutting edges of the casing sections, a pair of alined axles disposed in the axle bearings of the casing snugly fitting axle head will render support for the gear on excessive strain on the latter. In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

MARTIN HVEEM. Witnesses:

JAMES P. BEARD, -WM. COEYL. 

